As explained in this SO post, using JavaScript/JQuery, we can convert .docx files to html. We need to display this html in the default browser. In our Office.js add-in for WORD, we can get an html from WORD document but we are not sure how we display it in the browser. For example: user clicks a button in the task pane of the Add-in==>Add-in gets the html from the active Word document==>the Add-in code displays that html in the default browser. Question: Is there any Office.js API etc that will help us display that HTML in default browser?
I assume there's some reason why displaying it in a tab within the task pane isn't acceptable. (If it is, then that's something to consider.) There's also the Dialog API. It's a window of the default browser, but it doesn't have the browser ribbon or menu bars. If you want a full blown browser window to open, I don't think that there is an API in Office.js that will do that. You might take a look at the standard window.open() method.